Improve Sound Actuator

Hi,

I would create a virtual instrument with Game Engine and then I link to a mesh one key sensor and one sound actuator. In the sound actuator I select a wave create previously and select Loop stop (in really I try all possibility) but I can't manage correctly the sound (stop immediately or continuous till the end of the sound file) and the result is awful. I propose to integrate in the sound actuator an envelope curve to manage the sound like a synth. In the picture there is the concept of the new actuator.

Sergio